package net.bwie.realtime.jtp.dws.log.function;

import net.bwie.realtime.jtp.dws.log.bean.PageViewBean;
import org.apache.commons.lang3.time.FastDateFormat;
import org.apache.flink.streaming.api.functions.windowing.WindowFunction;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.util.Collector;

public class PageViewWindowFunction implements WindowFunction<PageViewBean, String, String, TimeWindow> {

    // 格式化实例
    private FastDateFormat format = FastDateFormat.getInstance("yyyy-MM-dd HH:mm:ss");
    @Override
    public void apply(String key, TimeWindow Window, Iterable<PageViewBean> input, Collector<String> out) throws Exception {
        // 1.获取窗口开始和结束时间
        String windowStartTime = this.format.format(Window.getStart());
        String windowEndTime = this.format.format(Window.getEnd());


        // 2.对窗口中数据计算
        Long pvCount = 0L;
        Long pvDuringTime = 0L;
        Long uvCount = 0L;
        Long sessionCount = 0L;
        for(PageViewBean pageViewBean : input){
            pvCount += pageViewBean.getPvCount();
            pvDuringTime += pageViewBean.getPvDuringTime();
            uvCount += pageViewBean.getUvCount();
            sessionCount += pageViewBean.getSessionCount();
        }

        // 3.输出数据
        String output = windowStartTime + "," + windowEndTime + ","
                + windowStartTime.substring(0,10) + ","
                + key + ","
                + uvCount + "," + sessionCount + "," + pvCount + "," + pvDuringTime;
        out.collect(output);
    }
}
